This is a yocto meta layer containing some minor adaptations and build instructions to generate a raspberry pi 1/2 image which contains Qt5.4.
qmlmirror-image.bb - This image will contain everything needed for a magic mirror interface on a screen. For more information, search the internet for Raspberry pi magic mirror.
For build instructions into an image, look at https://github.com/frznlogic/rpi-wayland-qt5
To integrate this with an already existing yocto build, git clone the repository into a suitable place, and add meta-rpi-qt5 directory to your local/bblayers.conf.
If necessary adapt your meta layer priority in meta-rpi-qt5/conf/layer.conf.